Link paper to dataset card

This PR updates the dataset card to include a direct link to the associated research paper: [Temporal Decay of Co-Citation Predictability: A 20-Year Statute Retrieval Benchmark from 396M Ukrainian Court Citations](https://huggingface.co/papers/2605.17639). Linking the paper helps users understand the methodology and context behind the benchmark.

README.md

@@ -2,8 +2,11 @@
 language:
 - uk
 license: cc-by-nc-sa-4.0
+size_categories:
+- 1K<n<10K
 task_categories:
 - text-retrieval
+pretty_name: UA-StatuteRetrieval
 tags:
 - legal
 - court-decisions
@@ -12,9 +15,6 @@ tags:
 - ukrainian
 - benchmark
 - temporal-degradation
-pretty_name: UA-StatuteRetrieval
-size_categories:
-- 1K<n<10K
 configs:
 - config_name: ablation_comparison
   data_files:
@@ -91,7 +91,7 @@ dataset_info:
 
 A large-scale benchmark for evaluating temporal stability of legal statute retrieval methods. Ground truth is derived exhaustively from 396 million codex-article citations extracted from 101 million Ukrainian court decisions (2007--2026).
 
-**Paper:** *Temporal Decay of Co-Citation Predictability: A 20-Year Statute Retrieval Benchmark from 396M Ukrainian Court Citations* (Ovcharov, 2025)
+**Paper:** [Temporal Decay of Co-Citation Predictability: A 20-Year Statute Retrieval Benchmark from 396M Ukrainian Court Citations](https://huggingface.co/papers/2605.17639) (Ovcharov, 2025)
 
 ## Dataset Configs
 
@@ -105,7 +105,7 @@ A large-scale benchmark for evaluating temporal stability of legal statute retri
 ## Key Findings
 
 1. **Co-citation predictability decays 33--47% over 12 years** (Mann-Kendall p < 0.005)
-2. **Decay is non-uniform**: criminal procedure remains stable (MRR ~0.40); civil law degrades from 0.35 to 0.15
+2. **Decay is non-uniform**: criminal procedure maintains stable co-citation patterns (MRR ~0.40); civil law degrades from 0.35 to 0.15
 3. **Neither BM25 nor dense retrieval (E5-large, BGE-M3) escapes temporal degradation**
 4. **Sliding-window mitigation improves MRR by 3--28%** over cumulative indexing
 
@@ -178,4 +178,4 @@ Derived from the Ukrainian Unified State Register of Court Decisions (EDRSR, htt
 ## Related Datasets
 
 - [overthelex/ua-court-citation-graph](https://huggingface.co/datasets/overthelex/ua-court-citation-graph) -- Co-citation graph (99.5M decisions)
-- [overthelex/ukrainian-court-decisions](https://huggingface.co/datasets/overthelex/ukrainian-court-decisions) -- Court decision metadata
+- [overthelex/ukrainian-court-decisions](https://huggingface.co/datasets/overthelex/ukrainian-court-decisions) -- Court decision metadata